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package content
import (
"context"
api "github.com/containerd/containerd/api/services/content/v1"
"github.com/containerd/containerd/content"
"github.com/containerd/containerd/content/proxy"
"github.com/moby/buildkit/session"
digest "github.com/opencontainers/go-digest"
ocispecs "github.com/opencontainers/image-spec/specs-go/v1"
"github.com/pkg/errors"
"google.golang.org/grpc/metadata"
)
type callerContentStore struct {
store content.Store
storeID string
}
func (cs *callerContentStore) choose(ctx context.Context) context.Context {
nsheader := metadata.Pairs(GRPCHeaderID, cs.storeID)
md, ok := metadata.FromOutgoingContext(ctx) // merge with outgoing context.
if !ok {
md = nsheader
} else {
// order ensures the latest is first in this list.
md = metadata.Join(nsheader, md)
}
return metadata.NewOutgoingContext(ctx, md)
}
func (cs *callerContentStore) Info(ctx context.Context, dgst digest.Digest) (content.Info, error) {
ctx = cs.choose(ctx)
info, err := cs.store.Info(ctx, dgst)
return info, errors.WithStack(err)
}
func (cs *callerContentStore) Update(ctx context.Context, info content.Info, fieldpaths ...string) (content.Info, error) {
ctx = cs.choose(ctx)
info, err := cs.store.Update(ctx, info, fieldpaths...)
return info, errors.WithStack(err)
}
func (cs *callerContentStore) Walk(ctx context.Context, fn content.WalkFunc, fs ...string) error {
ctx = cs.choose(ctx)
return errors.WithStack(cs.store.Walk(ctx, fn, fs...))
}
func (cs *callerContentStore) Delete(ctx context.Context, dgst digest.Digest) error {
ctx = cs.choose(ctx)
return errors.WithStack(cs.store.Delete(ctx, dgst))
}
func (cs *callerContentStore) ListStatuses(ctx context.Context, fs ...string) ([]content.Status, error) {
ctx = cs.choose(ctx)
resp, err := cs.store.ListStatuses(ctx, fs...)
return resp, errors.WithStack(err)
}
func (cs *callerContentStore) Status(ctx context.Context, ref string) (content.Status, error) {
ctx = cs.choose(ctx)
st, err := cs.store.Status(ctx, ref)
return st, errors.WithStack(err)
}
func (cs *callerContentStore) Abort(ctx context.Context, ref string) error {
ctx = cs.choose(ctx)
return errors.WithStack(cs.store.Abort(ctx, ref))
}
func (cs *callerContentStore) Writer(ctx context.Context, opts ...content.WriterOpt) (content.Writer, error) {
ctx = cs.choose(ctx)
w, err := cs.store.Writer(ctx, opts...)
return w, errors.WithStack(err)
}
func (cs *callerContentStore) ReaderAt(ctx context.Context, desc ocispecs.Descriptor) (content.ReaderAt, error) {
ctx = cs.choose(ctx)
ra, err := cs.store.ReaderAt(ctx, desc)
return ra, errors.WithStack(err)
}
// NewCallerStore creates content.Store from session.Caller with specified storeID
func NewCallerStore(c session.Caller, storeID string) content.Store {
client := api.NewContentClient(c.Conn())
return &callerContentStore{
store: proxy.NewContentStore(client),
storeID: storeID,
}
}
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